The battery voltage is hilariously wrong. You seem to be using a scale that goes from 0 - 4.6v
4.6 volts is only the input voltage.
The lithium-ion battery is charged with a separate circuit within the 3ds. If the battery really was 4.6 volts it would have blown up on you.
A lithium ion cell at 0% is about 3.2 volts. Fully charged it is about 4.2 volts.
Have a look at this discharge curve graph, with it you can implement a proper algorithm to calculate the battery voltage.
4.6 volts is only the input voltage.
The lithium-ion battery is charged with a separate circuit within the 3ds. If the battery really was 4.6 volts it would have blown up on you.
A lithium ion cell at 0% is about 3.2 volts. Fully charged it is about 4.2 volts.
Have a look at this discharge curve graph, with it you can implement a proper algorithm to calculate the battery voltage.